What is the perimeter of the figure

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities